Lawrence M Friedman

US Patent:

6704474, Mar 9, 2004

Filed:

Aug 8, 2002

Appl. No.:

10/215268

Inventors:

Terry A. Dorschner - Marlborough MA
Lawrence J. Friedman - Lexington MA
Douglas S. Hobbs - Lexington MA

Assignee:

Raytheon Company - Waltham MA

International Classification:

G02B 626

US Classification:

385 17, 385 16, 385 18, 385 20, 349159

Abstract:

A data communication system comprising a plurality of fiber optic cables and a fiber optic switching system, comprising: a support structure for securing light emitting/light receiving ends of the plurality of fiber optic cables in predetermined positions; and, means for re-directing light emitted from the light emitting/light receiving end of one of the fiber optic cables to the light emitting/light receiving ends of one, or more than one, of a plurality of the plurality of fiber optic cables. The re-directing means includes means for collimating and directing the light emitted from the end of one of the cables as a beam propagating along a predetermined direction and for re-directing the beam towards the end of another one of the cables selectively in accordance with an electrical signal. More particularly, the re-directing means includes electro-optical phase shifting medium, preferably liquid crystal molecules.

US Patent:

6810164, Oct 26, 2004

Filed:

Feb 3, 2004

Appl. No.:

10/770659

Inventors:

Terry A. Dorschner - Marlborough MA
Lawrence J. Friedman - Lexington MA
Douglas S. Hobbs - Lexington MA

Assignee:

Raytheon Company - Waltham MA

International Classification:

G02B 635

US Classification:

385 16, 385 17, 385 18, 385 2, 385 8, 349159, 349202

Abstract:

A data communication system comprising a plurality of fiber optic cables and a fiber optic switching system, comprising: a support structure for securing light emitting/light receiving ends of the plurality of fiber optic cables in predetermined positions; and, means for re-directing light emitted from the light emitting/light receiving end of one of the fiber optic cables to the light emitting/light receiving ends of one, or more than one, of a plurality of the plurality of fiber optic cables. The re-directing means includes means for collimating and directing the light emitted from the end of one of the cables as a beam propagating along a predetermined direction and for re-directing the beam towards the end of another one of the cables selectively in accordance with an electrical signal. More particularly, the re-directing means includes electro-optical phase shifting medium, preferably liquid crystal molecules.

US Patent:

7810147, Oct 5, 2010

Filed:

Dec 1, 2006

Appl. No.:

11/607836

Inventors:

William Duane - Westford MA, US
Lawrence N. Friedman - Arlington MA, US
Alexander Volanis - Chelmsford MA, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 7/04
G06F 15/16

US Classification:

726 9, 726 5, 726 6, 726 29, 713169, 713182, 709225

Abstract:

A system for detecting and preventing replay attacks includes a plurality of interconnected authentication servers, and one or more tokens for generating a one-time passcode and providing the one-time passcode to one of the authentication servers for authentication. The system includes an adjudicator function associated with each authentication server. The adjudicator evaluates a high water mark value associated with a token seeking authentication, allows authentication to proceed for the token if the high water mark evaluation indicates that the one-time passcode was not used in a previous authentication, and prevents authentication if the high water mark evaluation indicates that the one-time passcode was used in a previous authentication. The token is associated with a home authentication server that maintains a current high water mark of the token. The home authentication server validates the current high water mark on behalf of the adjudicator function evaluating the token for authentication.

US Patent:

8327422, Dec 4, 2012

Filed:

Sep 26, 2008

Appl. No.:

12/238756

Inventors:

Lawrence N. Friedman - Arlington MA, US
Paul A. Dennis - Wayland MA, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 7/04

US Classification:

726 5, 726 10, 713168, 713171

Abstract:

A technique supports authentication of a server device (e. g. , a web site). The technique involves supplying a user device (e. g. , a client browser) with a user mechanism (e. g. , a browser plug-in) which is constructed and arranged to dynamically generate user representations. The technique further involves receiving, at the server device, a request from the user device. The technique further involves providing a server representation to the user device from the server device in response to the request. The user device successfully authenticates the server device when a user representation dynamically generated by the user mechanism matches the server representation provided to the user device. However, the user device unsuccessfully authenticates the server device when the user representation dynamically generated by the user mechanism does not match the server representation provided to the user device.

US Patent:

8631486, Jan 14, 2014

Filed:

Mar 31, 2009

Appl. No.:

12/414845

Inventors:

Lawrence N. Friedman - Arlington MA, US
Riaz Zolfonoon - Marlborough MA, US
William M. Duane - Westford MA, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 21/00

US Classification:

726 19, 726 4, 726 21

Abstract:

A method is used in identity assurance. A process is executed that is used to verify a user identity. A description of the executed process is stored and is used to determine a level of trust.

US Patent:

8650405, Feb 11, 2014

Filed:

Jun 30, 2011

Appl. No.:

13/173607

Inventors:

Yedidya Dotan - Tel Aviv, IL
Lawrence N. Friedman - Arlington MA, US
Oleg Freylafert - Hod Hasharon, IL
Robert S. Philpott - Andover MA, US
Daniel Schiappa - Bedford NH, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 21/00

US Classification:

713182

Abstract:

An improved PIN-based authentication technique for authenticating the user of a client machine to a server automatically generates a personal identification number (PIN) for the user based on user-specific authentication information, such as encrypted cookie information. The server provides user-specific authentication information to a client machine. When the user submits an authentication request, user-specific authentication information is collected and uploaded to the server. The user-specific authentication information is processed to form a PIN, and authentication of the user proceeds based on the PIN and any other authentication factors provided. Since the disclosed techniques compute PINs automatically based on information exchanged between a client machine and a server, the user is relieved of any burden associated with registering and remembering a PIN.

US Patent:

59636823, Oct 5, 1999

Filed:

Mar 7, 1997

Appl. No.:

8/813528

Inventors:

Terry A. Dorschner - Brookline MA
Lawrence J. Friedman - Lexington MA
Douglas S. Hobbs - Lexington MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

G02B 626

US Classification:

385 16

Abstract:

A data communication system comprising a plurality of fiber optic cables and a fiber optic switching system, comprising: a support structure for securing light emitting/light receiving ends of the plurality of fiber optic cables in predetermined positions; and, means for re-directing light emitted from the light emitting/light receiving end of one of the fiber optic cables to the light emitting/light receiving ends of one, or more than one, of a plurality of the plurality of fiber optic cables. The re-directing means includes means for collimating and directing the light emitted from the end of one of the cables as a beam propagating along a predetermined direction and for re-directing the beam towards the end of another one of the cables selectively in accordance with an electrical signal. More particularly, the re-directing means includes electro-optical phase shifting medium, preferably liquid crystal molecules.